EVERYDAY SCIENCE

Detailed explanation-1: -Oxygenated blood flows only through the left side of the heart, and deoxygenated blood flows through the right side of the heart. The right and the left sides of the heart are separated by atrio-ventricular septal walls.

Detailed explanation-2: -The septum helps keep oxygen-rich blood from the lungs from mixing with oxygen-poor blood from the body. It also prevents blood from flowing back into the heart chambers after pumping it out.

Detailed explanation-3: -The only artery that picks up deoxygenated blood is the pulmonary artery, which runs between the heart and lungs.

Detailed explanation-4: -They are separated by the inter atrial septum. There is no mixing of deoxygenated and oxygenated blood in human heart due to the presence of inter-atrial and inter-ventricular septum. These septa completely divide the atria and ventricles into right and left to avoid mixing of blood.

Detailed explanation-5: -Without septum, oxygenated blood cannot be separated properly. Thus, the role of septum is to prevent the mixing of the oxygenated which is oxygen rich and deoxygenated which is oxygen poor blood.